Dial-up

• Dial-up access, typically to the Internet
• A service feature in which a user initiates service on a previously arranged trunk or transfers, without human intervention, from an active trunk to a standby trunk.
• A service feature that allows a computer terminal to use telephone systems to initiate and effect communications with other computers.

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data transmission circuit date time group db (car) db(a) dbm dbrn data circuit terminating equipment decollimation decrypt degradation degree of isochronous distortion	degree of start stop distortion dejitterizer delay delay encoding delay line delta modulation demand assignment demand factor demand load desensitation design objective	detector deterministic routing d 4 pulse dialing dielectric dielectric strength differential encoding differential manchester encoding diffraction grating digital access and cross connect system digital filter	digital milliwatt digital multiplex hierarchy digital signal 0 digital subscriber line digital transmission group digitizer digroup direct access direct connect direct distance dialing directional coupler